kennedy elicits this blistering response from his opponent. >> senator, you are no jack kennedy. >> body language plays a part in the presidential debate. in 1992, george h.w. bush deliberately looks at his watch and he pays for it when the audience and voters see it as disrespectful. body language makes a difference in the debate between al gore and george w. bush as well. gore sighs over and over again and bush, the underdog, surprises by winning the debate and of course, the election. both president obama and governor romney are seasoned debaters, and experts say neither are prone to making major gaffes. but if there is one thing that history has taught us, when it comes to presidential debates, expect the unexpected. joining us now to talk about the moments and debate magic yet to come, republican consultant romney 2008 campaign advisor, alex castellanos and donna brazile. a lot of folks are saying these debates are do or die for romney. donna, do you agree? >> absolutely. first impression is very, very important. mitt romney had several opportunities to change the trajectory of the